51A3

51A3-IMPLAUSIBLE MINIMUM ENGINE TORQUE MESSAGE RECEIVED

For a complete wiring diagram, Refer to the Wiring Information Electrical Diagrams.

Theory of Operation

The messages sent on the CAN bus are distinguished by an identifier (ID). Each CAN ID is defined to contain a certain number of bytes. The Anti-Lock Brake Module (ABM) verifies that it has received the proper number of bytes for each ID.

- When Monitored:
Continuously with the ignition on, one valid CAN ID received at least once, and no U0002-CAN Bus Off Performance DTC present.

- Set Condition:
When the ABM detects an incorrect CAN ID from the ECM.





1. CHECK FOR BCM CAN BUS DTCS
1. With the scan tool, read BCM DTCs.

Are there any BCM CAN BUS DTCs present?

Yes

- Perform the appropriate diagnostic procedure.Testing and Inspection

No

- Go To 2

2. CHECK IF ENGINE DTCS ARE PRESENT
1. With the scan tool, read engine DTCs.

Are there any engine DTCs present?

Yes

- Perform the appropriate diagnostic procedure.Testing and Inspection
- Perform the ECM VERIFICATION TEST. Verification Tests.

No

- Replace the Anti-Lock Brake Module.
- Perform ABS VERIFICATION TEST. Verification Tests.